diff --git a/src/gallium/auxiliary/util/u_bitcast.h b/src/gallium/auxiliary/util/u_bitcast.h
index 703ea64e4dd..f5b33471ad1 100644
--- a/src/gallium/auxiliary/util/u_bitcast.h
+++ b/src/gallium/auxiliary/util/u_bitcast.h
@@ -45,6 +45,14 @@ u_bitcast_f2u(float f)
    return u;
 }
 
+static inline uint64_t
+u_bitcast_d2u(double d)
+{
+   uint64_t u;
+   memcpy(&u, &d, sizeof(u));
+   return u;
+}
+
 static inline float
 u_bitcast_u2f(uint32_t u)
 {
@@ -53,6 +61,14 @@ u_bitcast_u2f(uint32_t u)
    return f;
 }
 
+static inline double
+u_bitcast_u2d(uint64_t u)
+{
+   double d;
+   memcpy(&d, &u, sizeof(d));
+   return d;
+}
+
 #ifdef __cplusplus
 }
 #endif